197993656 has 64 divisors (see below), whose sum is σ = 432967680. Its totient is φ = 83137920.

The previous prime is 197993647. The next prime is 197993659. The reversal of 197993656 is 656399791.

197993656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 197993597 and 197993606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197993659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036521 + ... + 1036711.

It is an arithmetic number, because the mean of its divisors is an integer number (6765120).

Almost surely, 2^197993656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197993656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216483840).

197993656 is an abundant number, since it is smaller than the sum of its proper divisors (234974024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197993656 is a wasteful number, since it uses less digits than its factorization.

197993656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 480 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 55.

The square root of 197993656 is about 14071.0218534405. The cubic root of 197993656 is about 582.8414433671.

The spelling of 197993656 in words is "one hundred ninety-seven million, nine hundred ninety-three thousand, six hundred fifty-six".